Three species of cormorants nest in the Monterey Bay area; Brandt's, double-crested, and pelagic. Each species has different nesting habits. Brandt's cormorants build nests out of seaweed and are packed close together along level or slightly sloped tops of rocky islets. Pelagic cormorants like to nest in cavities along the side of sheer cliffs and offshore rocks. Double-crested cormorants often build their nests in trees.

Cormorants are excellent fishing birds. They are often seen swimming partially submerged on the water's surface, only to suddenly disappear with a splash as they dive for fish. These dives can reach depths of up to 100 feet.